Physical therapy cushion



FIG. 1 is an isometric view of a cushion showing my design;

FIG. 2 is an end view;

FIG. 3 is a right side view, the left side view thereof being a mirror image of the right side view;

FIG. 4 is a second end view; and

FIG. 5 is a bottom view. 

The ornamental design for a physical therapy cushion, substantially as shown and described. 